Heating Curves
Phase change
Convert 5000 mL to L
5 L
What phase of matter feels the least particle attraction?
Gas
What is the freezing and boiling points of WATER.
0*C and 100*C
What is the density formula?
D=M/V
Why does water explode when in a glass bottle placed in the freezer ?
Between which two labeled "ts" is the freezing point of water?
Between t1 and t2
If the mass of a substance is 25g, and the volume is 25mL, what is the density of the substance ?
1.0 g/mL
What is another volume unit besides mL for the density formula ?
cm3
What is happening between t4 and t5 on the heating curve?
The substance is overcoming IMF by absorbing heat.
If the density of water is 1.0 g/mL and unknown substance A has a density of 0.9 g/mL, which substance would be on the bottom of the container when mixed?
What is the Percent Error Formula ?
%E = (abs(A-E))/A
Draw a heating curve with all of the aspects on the board
SA will vary.
SA will vary. Examples include: not zeroing the scale, reading the meniscus at the top, reading the meniscus either too high or too low, water on the scale but not in the cylinder, etc.
It allows us to measure what is in the graduated cylinder without the weight of the graduated cylinder.